Using a speedometer tester
WARNING: This page is about a different car, the 2003 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.
- Adjust the tire air pressure to the specification.
- Using a speedometer tester, verify that the speedometer indication is within the allowable ranges shown below.
Courtesy of MAZDA MOTORS CORP.
- Verify that fluctuation of the speedometer needle is within the allowable range.
- If the speedometer needle does not move or the indication is outside of the allowable range, inspect the PCM and related wiring harness.
- If the PCM and related wiring harness are normal, replace the instrument cluster.
Needle fluctuation allowable range
- Within 3.0 km/h
- If the speedometer needle does not move or the indication is outside of the allowable range, inspect the PCM and related wiring harness.